| 摘要 |
An image reading apparatus includes a laser source, a stage on which an image carrier can be placed, a light detector for detecting light released from the image carrier, and an optical head for condensing the laser beam emitted from the laser source onto the image carrier and condensing light released from the image carrier to lead it to the light detector and being two-dimensionally movable parallel to the stage, and a perforated mirror formed with a hole at a center portion thereof, and fixed in a path of the laser beam so that the laser beam can pass through the hole and light released from the image carrier and condensed by the optical head can be reflected thereby in such a manner that a path of the light is branched off from the path of the laser beam.
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